726765 has 16 divisors (see below), whose sum is σ = 1252608. Its totient is φ = 357696.

The previous prime is 726751. The next prime is 726779. The reversal of 726765 is 567627.

It is an interprime number because it is at equal distance from previous prime (726751) and next prime (726779).

It is not a de Polignac number, because 726765 - 2⁶ = 726701 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 726765.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1669 + ... + 2058.

It is an arithmetic number, because the mean of its divisors is an integer number (78288).

2⁷²⁶⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

726765 is a deficient number, since it is larger than the sum of its proper divisors (525843).

726765 is a wasteful number, since it uses less digits than its factorization.

726765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3748.

The product of its digits is 17640, while the sum is 33.

The square root of 726765 is about 852.5051319494. The cubic root of 726765 is about 89.9079305370.

The spelling of 726765 in words is "seven hundred twenty-six thousand, seven hundred sixty-five".